Anthraquinone dyestuffs

ABSTRACT

ANTHRAQUINONE DYESTUFFS OF THE FORMULA   A-(NH-C(-R1)=C(-CN)-R2)N   IN WHICH A IS SUBSTITUTED OR UNSUBSTITUTED ANTHRAQUINONE RADICAL; R1 IS H, SUBSTITUTED OR UNSUBSTITUTED HYDROCARBON; R2 IS CN OR A CARBOXYLIC ACID ESTER RADICAL; AND N IS A NUMBER FROM 1 TO 4; AND THEIR PREPARATION BY CONDENSATION OF N-ANTHRAQUINONYL-N&#39;&#39;-AMIDINIUM SALTS WITH CYANOACETIC ACID ESTGERS OR MALONIC DINITRILE IN THE PRESENCE OF ACID-BINDING AGENTS, E.G. ALKALI METAL OXIDE, HYDROXIDES CARBONATES, ARE DISCLOSED.

United States Patent Ofice 3,654,319 Patented Apr. 4, 1972 3,654,319 ANTHRAQUINONE DYESTUFFS Rutger Neelf, Leverkusen, Germany, assignor to Farbenfabriken Bayer Aktiengesellschaft, Leverkusen, Germany No Drawing. Filed May 3, 1967, Ser. No. 635,648 Claims priority, application Germany, May 3, 1966,

Int. Cl. C09b1/26, 1/50 US. Cl. 260-376 12 Claims ABSTRACT OF THE DISCLOSURE Anthraquinone dyestuffs of the formula R cu I I ANli-C=C"R This invention relates to new anthraquinone dyestuffs, and the production and use thereof.

The new anthraquinone dyestufi's according to the invention are those of the Formula I:

wherein R is hydrogen, fluorine, chlorine, bromine, hydroxy, cyano, trifluoromethyl, lower alkyl, lower alkoxy or lower alkoxy lower al koxy; and R is lower alkyl, phenyl lower alkyl, phenyl or lower alkoxy lower alkyl.

A second preferred class of dyestuffs within the definition of Formula I are those of Formula lb:

wherein R, has the above identified meaning and R is hydrogen, hydroxy, lower alkoxy, nitro, or amino.

The new dyestuifs are produced, according to the invention, when anthraquinonyl-N'-amidinium salts of the Formula 'II:

in which A, R, and n have the same meaning as above, R and R are hydrogen or alkyl radicals which may be linked with one another, optionally with the inclusion of a hetero atom, or R stands for an aryl radical, and X is an anion, are condensed in the presence of acid-binding agents with cyanoacetic acid esters or with malonic dinitrile.

The N-anthraquinonyl-N'-amidinium salts of the Formula II used as starting materials may contain in the anthraquinone radical, besides the grouping one or more substituents, for example, halogen atoms, such as fluorine, chlorine or bromine; hydroxyl groups; lower alkoxy groups, amino groups; acylamino groups; alkylamino groups with 1 to 3 carbon atoms; cycloalkylamino groups; arylamino groups, wherein the aryl radical is preferably a phenyl group which may be substituted by one or more halogen atoms; alkyl or alkoxy groups; alkylor optionally substituted phenyl-sulphonyl groups; alkylor optionally substituted phenyl-thiether radicals; cyano, carboxyl, carboxylic acid ester and acetyl groups; alkylor optionally substituted phenyl-sulphonylamino groups; or optionally substituted sulphonamide groups. The aforesaid alkyl groups are preferably lower alkyl radicals. By lower is meant a carbon content of 1 to 6. The anthraquinone radicals employed in the dyestufis of the preesnt invention can be tetracyclic i.e. can have a fourth fused ring. In other words the anthraquinone radicals employed in the dyestuffs of the present invention can have up to 4 fused rings. Examples of tetracyclic anthraquinone radicals are 1,9-isothiazoleanthrone,, 1,9-anthrapyrimidine, 1,9-pyrazoleanthrone and N-methyl-1,9-anthrapyridone.

The kind of anion of the N-anthraquinonyl-N'-amidinium salts of the Formula H used according to the invention is of no importance for the condensation with cyanoacetic esters or malonic dinitrile. For example, the anion can be a halogen ion, such as a chlorine or bromine ion, or a nitrate, sulphate, phosphate, boron tetrafiuoride, ben zene-sulphonate, toluene-sulphonate, oxalate or succinate anion. The nature of the group of the amidinium salts of the Formula II is likewise of no importance for the condensation with cyanoacetic esters or malonic dinitrile. For example, the

group can be an amino, methylamino, ethylamino, methylethyl-amino, phenylamino, phenyl-methylamino, diethylamino, dipropylamino, pyrrolidino, piperidino, morpholino or, preferably, a dimethylamino group.

When R is a hydrocarbon radical it can have from 1 to 20 carbon atoms. The radical R, can be alkyl or aryl. Suitable alkyl radicals include among others lower alkyl, lower alkoxy lower alkyl, lower alkyl ketone lower alkyl. In addition the hydrocarbon radical can be substituted by 1 to 3 but preferably 1 non-interfering substituent which does not materially alter the hydrocarbon nature of the radical. Examples of suitable substituents include among others the halogens such as fluorine, chlorine, bromine or iodine, amino groups, monoalkyl and dialkyl substituted amino groups, and carboxylic acid ester groups. Examples of suitable aryl groups include among others benzene and naphthalene, although benzene is preferred. The aryl groups can be substituted with from 1 to 8 substituents. Suitable substituents include among others the halogens such as fluorine, chlorine, bromine, and iodine, lower alkyl, lower alkoxy, lower alkoxy lower alkyl, lower alkoxy, Inercapto, alkyl mercapto, sulphonyl lower alkyl sulphonyl and alkyl groups of l to 14 carbon atoms any of which can be substituted by the above described substituents suitable when R is alkyl.

Examples of N-anthraquinonyl-N'-amidinium salts of the Formula II are the compounds given below; in the formulae R may have the following meaning, for example:

on-on,

011 -0 0 CCH2-, 021150 0 o- I 011 0-028 FO S- l (I) NH-- C=N (CH 2 X X=H, Cl, Br, CH OCH CF m m I ll||II|. H G H H G n \H w z w I..|||l|l| z m N U N Ill 3 w 1 w YI m N R c X RIG X II M I m H d Ur H N II o 3 h RIc 0 R G X N l0 H m 0 0 m m 0 N I T I I n I H fl JWIR 0" i O I 0 N IO N W, No B LIN I N L H m m OI 0 m 0 w m w m M m H H r M N H H L C w C 0 w C c X X X X Y 5 m m w w w m m m M m m m n n a I n |.z|||l||| u r c u u m \n a I z 2 w "m I m N m N 3 3 I C M h w w w w m w m N m N N N N N w I: r :11: 1 I Al H I I. m H H m H H H m H H M 0 R J B 4 N N N N N N M N mI Im N o H H oI H0 N N 0" 0 0 0 0 0" I0 0 0 0| 0" O IN I I l I. 1 .I I. 0 O 2 N. N2 01 0 N. H H MIIM o o o 0 I0 H u x X=H, Cl, CH

For the condensation of the aforesaid N-anthraquinonyl-N-amidinium salts of the Formula II there are preferably used alkyl esters with 1 to 6 carbon atoms, the alkyl groups of which may be substituted by one or more substituents of the following type:

Halogen atoms; hydroxyl, alkoxy, hydroxyalkyleneoxy, alkoxyalkylene-oxy or cyano groups; or by amino groups which may be substituted by alkyl, hydroxyalkyl, alkoxyalkyl or cyanoalkyl radicals. Examples of these optionally substituted alkyl groups are the methyl, ethyl, propyl, isopropyl, butyl, isobutyl, amyl or isoamyl groups; the 2-chloro-, 2-bromo-, 2-hydroxy-, 2-methoxy, 2-ethoxyor Z-cyanoethyl radicals; the 3-chloro-, 3-hydroxyor 3-methoxy-propyl groups; the 4-methoxy-butyl radical; the hydroxy-, methoxyor ethoxy-ethylene-oxy-ethyl groups; and the dimethyl-, diethyl-, bishydroxyethyl-, bismethoxyethylor biscyanoethyl-aminoethyl groups.

If cyanoacetic acid aralkyl ester is used, then benzyl ester, p-chloro-, p-methylor p-methoxy-benzyl ester are primarily suitable. Preferred cyanoacetic alkenyl esters are the vinyl, propenyl-(l) or propenyl-(2) esters. As cyanoacetic acid aryl ester there is preferably used the phenyl ester which may be substituted in the phenyl group by halogen atoms, such as chlorine or bromine; lower alkyl groups, such as the methyl or ethyl groups; or alkoxy groups, such as the methoxy, ethoxy or B-methoxyethylene-oxy groups.

The process can be carried out in such a manner that the aforesaid N-anthraquinonyl-N-amidinium salts of the Formula II are condensed with cyanoacetic esters or malonic dinitrile at, for example, 0250 C. in the presence of an acid-binding agent; the reaction components are used in equivalent amounts or the cyanoacetic ester or malonic dinitrile and the acid-binding agent are used in excess. Organic solvents are expediently used as reaction medium, for example, alcohols, such as ethanol, propanol or ethylene glycol; ether alcohols, such as glycol monomethyl ether or diethylene glycol monomethyl ether; ethers, such as dibutyl ether; esters, such as glycol monomethyl ether acetate; carboxylic acid amides, such as dimethyl formamide; dialkyl-sulphoxides or -sulphones, such as dimethyl sulphoxide or tetramethylene-sulphone; ketones, such as butanone-(Z); or hydrocarbons, such as benzene, toluene, chlorobenzene o-dichlorobenzene or nitrobenzene.

Suitable acid-binding agents are, for example, oxides, hydroxides or salts of alkali metals or alkaline earth metals with weak inorganic or organic acids, such as calcium oxide, sodium or potassium hydroxide, sodium or potassium carbonate, sodium or ammonium hydrogen carbonate, sodium or potassium acetate, and also tertiary organic bases, such as triethylamine, N,N-dimethyl-aniline, pyridine, picoline or quinoline, or organic metal compounds, such as sodium methylate and sodium ethylate.

According to another method of carrying out the present process, amino-anthraquinones are converted in known manner in a suitable solvent into the aforesaid N-anthraquinonyl-N'-amidinium salts of the Formula II and the latter are condensed, without isolation, with cyanoacetic esters or malonic dinitrile in the presence of acid binding agents. The dyestufis (I) are thus obtained in a very simple manner with high yields.

The dyestuffs which can be obtained by the present process are suitable, for example, as pigments for colouring plastic masses fast to migration. However, the dyestuffs or mixtures thereof serve primarily for the dyeing of natural fibres and synthetic materials, preferably polyamides, polyurethanes, polyacrylonitriles, polypropylene and polyesters; the polyesters comprise, in particular, linear aromatic polyesters, such as polyethylene terephthalate or polyesters obtained from terephthalic acid and 1,4-bishydroxy-methylcyclohexane, and also cellulose esters, such as cellulose triacetate or cellulose-2V2 acetate. It is advantageous to bring the dyestuffs into a fine dispersion by the usual methods, for example, by reprecipitation, grinding or kneading in the presence of dispersing agents, and to apply them according to the known dyeing methods. While cellulose-2V2 acetate, for example, is dyed in the presence of Marseilles soap at 60-80 C., cellulose tri acetate and polyamide fibres can be dyed at C. For dyeing polyethylene terephthalate fibres, the usual dyeing accelerators can be added or dyeing can be performed at -145 C. under pressure. Dyeing and printing is preferably carried out according to the thermosol process in which the printed or dyed fibre materials are briefly heated to temperatures ranging from to 220 C. optionally after an intermediate drying. Heating is generally carried out for periods of time ranging from 30 seconds to 2 minutes.

The dyeings and prints obtained with the dyestuffs which can be prepared according to the present invention are characterised by a very good texture, a high dyestuff yield and clear shades of excellent fastness to light, washing, thermofixing and ironing.

In the following Examples the parts are parts by weight unless otherwise stated.

EXAMPLE 1 (a) 75 parts l-amino-4-phenylamino-anthraquinone and 18.9 parts dimethyl formamide in 225 parts o-dichlorobenzene are slowly mixed at 50-60" C. with 31.6 parts thionyl chloride; stirring is then continued at 50-60 C. for 1 hour, followed either by further stirring in a 'vacuum at about 20-200 mm. Hg or by passing through nitrogen or air. The melt which contains grey-violet prisms is then mixed at 50-60 C. with 33 parts cyanoacetic acid ethyl ester, 40 parts of anhydrous sodium acetate are introduced, and stirring is continued at 50-60 C. until the formation of fine grey-blue prisms is completed. After cooling, the product is filtered off with suction, washed with methanol and water, and after drying there are obtained 96 parts B-(4 phenylamino 1 anthraquinonylamino)-a-cyanoacrylic acid ethyl ester or 91% of theory.

C H gO N (437.3). Calcd. (percent): N, 9.62; O, 14.62. Found (percent): N, 9.71; O, 14.74.

(b) A fabric of polyethylene terephthalate fibres is impregnated on a foulard with a liquor containing, per litre, 20 g. 19-(4-phenylamino-l-anthraquinonylamino)-acyanoacrylic acid ethyl ester and 10 g. of a thermosol auxiliary, especially a polyether as described, for example, in Belgian patent specification No. 615,102. The fabric is then squeezed to a weight increase of 70% and dried in a suspended nozzle drier or drying cabinet at 80-120 C. The fabric is subsequently treated on a stenter or in a nozzle hot flue at 190-220 C. with hot air for about 45 minutes, then rinsed, reductively after-treated, if desired, then washed, rinsed and dried. The reductive aftertreatment to remove the dyestuff particles which superficially adhere to the fibre can be carried out by introducing the fabric at 25 C. into a liquor containing 3-5 cc./litre of a sodium hydroxide solution at 38 B6 and 1-2 g./litre of concentrated hydrosulphite, heating the bath to 70 C. within about 15 minutes and keeping it at 70 C. for a further minutes. The fabric is subsequently rinsed hot, acidified at 50 C. with 2-3 cc./litre of 85% formic acid, rinsed and dried. A deep blue-grey dyeing is obtained, which is characterised by its high dyestuif yield and very good texture and by excellent fastness to light, thermofixing, washing, rubbing and sublimation. Similarly, a deep blue-grey dyeing is obtained when polyester fibres produced from 1,4-bis-hydroxymethyl-cyclohexane and terephthalic acid, cellulose triacetate fibres or polyamide fibres are used, instead of the polyethylene terephthalate fibres.

(c) A previously cleaned and thermofixed fabric of polyethylene terephthalate fibres is printed with a printing paste consisting of the following components: 40 g. of the dyestutf mentioned in Example 1(b), 475 g. of water, 465 g. of crystal gum 1:2 and 20 g. sulphonated castor oil. An alginate thickener can also be used, instead of crystal gum. The printed and dried material is passed at 190-220 C. over a high capacity stenter or through a condensation apparatus, in order to fix the dyestutf. The duration of the treatment is about 30-60 seconds. The resultant fixed print is subsequently rinsed cold, soaped with 1-2 g./ litre of an anion-active detergent at 70-80 C. for about 10 minutes, rinsed first hot and then cold, and dried. A print is thus obtained which corresponds to the dyeing obtained in Example 1(b) and is characterised by the same excellent fastness properties. Similarly a deep blue-grey print is obtained, when polyester fibres produced from 1,4-bis-hydroxymethyl-cyclohexane and terephthalic acid or fibres of cellulose triacetate or polyamide are used, instead of the polyethylene terephthalate fibres.

EXAMPLE 2 32.2 parts N-(4-phenylamino-1-anthraquinonyl)-N-dimethyl-formamidinium chloride and 17 g. cyanoacetic acid benzyl ester in 150 parts nitrobenzene are mixed at 50-60 C. with 10 g. of anhydrous acetate and the mixture is stirred at 50-60 C. until the formation of the dyestuif in the form of blue-grey prisms is completed. After cooling, the product is filtered off with suction and after washing with methanol and water, there are obtained 36 parts li-(phenylamino 1 anthraquinonylaminoyacyanoacrylic acid benzyl ester or 90.5% of theory.

C H O N (499.3). Calcd. (percent): N, 8.42; O, 12.81. Found (percent): N, 8.57; O, 12.89.

When applied to polyester fibres obtained from polyethylene terephthalate or from 1,4-bis-hydroxymethylcyclohexane and terephthalic acid, or to fibres of cellulose triacetate or polyamide by dyeing or printing according to Example 1(b) or 1(c), the dyestutf yields blue-grey shades of excellent fastness properties.

Analogous B-(4-phenylamino-1-anthraquinonylamino)- vat-cyanoacrylic acid esters are obtained by using for the conversion of N-(4-phenylamino- 1-anthraquinonyl)-N'-dimethyl-formamidinium chloride the following esters of cyanoacetic acid, instead of cyanoacetic acid benzyl ester: methyl, ethyl, n-propyl, isopropyl, n-butyl, isobutyl or amylester; 2-hydroxy-, 2'-chloro-, 2'-bromo-, 2'-cyano-, 2'-methoxyor 2'-ethoxy-ethyl ester; 3'-methoxypropyl or 4'-methoxy-butyl ester; 2'-(fi-hydroxyor -methoxy-eth- 12 ylene-oxy)-ethyl ester; 2'-dimethylaminoor 2'-diethylamino-ethyl ester; 2'-bis-(fl-hydroxyethyl)-, 2'-bis-(methoxyethyl)- or 2'-bis-(fi-cyanoethyD-aminoethyl ester; vinyl or allyl ester; p-chlorobenzyl or 3-phenylpropyl ester; phenyl, p-chlorophenyl or p-methoxyphenyl ester.

EXAMPLE 3 27.4 parts 1-amino-4-(p methoxy-phenylamino)-anthraquinone and 6.3 parts dimethyl formamide in parts nitro benzene are mixed at 50-60 C. with 10.5 parts thionyl chloride; when the formation of amidinium chloride is completed, the mixture is stirred in a vacuum for about 1 hour. 11 parts cyanoacetic acid ethyl ester are then added, 20 parts anhydrous sodium acetate are introduced, and the mixture is stirred at 50-60 C. until the formation of the dyestufi? in the form of dark blue small needles is completed. The product is filtered OK with suction when cold, washed with methanol and water, and there are obtained 32 parts B-(4-p-methoxy-phenyla-mino-1-anthraquinonylamino)-a-cyanoacrylic acid ethyl ester or 86% of theory.

C27H2104N3: (467.3). Calcd. (percent): N, 8.99; O, 17.1. Found (percent): N, 8.92; O, 17.26.

When applied to fibres of polyethylene terephthalate, cellulose triacetate or polyamide by dryeing or printing according to Examples 1(b) or 1(c), the dyestuff yields grey-blue shades of excellent fastness to light, washing and thermofixing.

The dyestuffs which are obtained according to Example 3 from appropriately 4-substituted 1-amino-4-aryl-, -aralkyl-, -cycloallcylor alkyl-amino-anthraquinones and their shades on polyethylene terephthalate fibers are as stated in the following table:

cyanoacrylic acid ethyl ester.

EXAMPLE 9 25 parts 1-amino-4-phenylamino-anthraquinone and 6.3 parts dimethyl formamide in 150 parts nitrobenzene are mixed at 50-60 C. with 10.5 parts thionyl chloride; when the formation of amidinium chloride is completed, the mixture is stirred in a vacuum for about 1 hour. 6.6 parts malonic dinitrile are then added, 15 parts of anhydrous sodium acetate are introduced, and the mixture is stirred at 50-60 C. until the dyestufi formation is completed. After cooling, the product which crystallises in the form of dark-violet small needles is filtered off with suction, washed with methanol and water, and there are obtained 29 parts B-(4-phenylamino-1-anthraquinonylamino)wit-cyanoacrylic acid nitrile or 93% of theory.

C d-1 N 0 (390.3), Calcd. (percent): N, 14.35; 0, 8.21. Found (percent): N, 14.28; 0, 8.32.

When applied to fibres of polyethylene terephthalate, cellulose triacetate or polyamide by dyeing or printing according to Examples 1(b) or 1(c), the dyestuff yields, with a very good texture and high yield, blue-grey shades which are characterised by excellent fastness to light, washing, thermofixing, rubbing and ironing.

The dyestuffs which are obtained according to Example 9 from appropriately 4-substituted 1-amino-4aryl-, -aralkyl-, -cycloalkylor -alkyl-amino-anthraquinones and their shades on polyethylene terephthalate fibres are stated in the following table:

EXAMPLE 17 28.8 parts N-(4,8-dihydroxy--amino-l-anthraquinonyl)-N-dimethyl-formamidinium chloride and 6.6 parts malonic dinitrile in 180 parts nitrobenzene are mixed at 5060 C. with 14 parts of anhydrous sodium acetate and the mixture is stirred at 5060 C. until the dyestulf formation is completed. After cooling, the product which crystallises in the form of grey-violet small needles is filtered off with suction, washed with methanol and water, and there are obtained 27.4 parts B-(4,8-dihydroxy- S-amino-l-anthraquinonylamino) wcyanoacrylic acid nitrile or 99.5% of theory.

C H N O (346.3). Calcd. (percent): N, 16.17; 0, 18.47. Found (percent): N, 16.03; '0, 18.62.

When applied to fibres of polyethylene terephthalate, cellulose triacetate or polyamide by dyeing or printing according to Example 1(b) or 1(c), the dyestuff yields reddish blue shades of excellent fastness to light, washing and thermofixing.

The isomeric fl-(4,5-dihydroxy-8-amino-l-anthraquinonylamino)-a-cyanoacrylic acid nitrile, which dyes fibres of polyethylene terephthalate, cellulose triacetate and polyamide according to Example 1(b) in navy-blue shades, is obtained according to Example 17 by using, instead of the amidinium chloride there mentioned, the same amount of N-(4,5-dihydroxy-8-amino-l-anthraquinonyl)-N-dimethyl-formamidinium chloride.

EXAMPLE 18 288 parts N-(4,8-dihydroxy-5-amino-l-anthraquinonyl)-N'-dimethyl-forma midinium chloride and 11 parts cyanoacetic acid ethyl ester in 180 parts nitrobenzene are mixed at 50-60 C. with 14 parts of anhydrous sodium acetate and the mixture is stirred until the dyestufl? formation is completed. After cooling, the product which crystallises in the form of reddish blue small needles is filtered off with suction, washed with methanol and water, and there are obtained 30 parts fi-(4,8-dihydroxy-5-aminol-anthraquinonylamino)-a-cyanoacrylic acid ethyl ester of 96% of theory.

C H N O (393.3). Calcd. (percent): N, 10.68; 0, 24.4. Found (percent): N, 10.79; 0, 24.23.

When applied to fibres of polyethylene terephthalate, cellulose acetate or polyamide by dyeing or printing according to Example 1(b) or 1(c), the dyestufi yields strong reddish blue shades of excellent fastness to light, washing, thermofixing and ironing.

Analogous 8-(4,8-dihydroxy-5-amino-l-anthraqninonylamino)-a-cyanoacrylic acid esters are obtained by using for the conversion of N-(4,S-dihydroxy-S-amino-l-anthraquinonyl)-N-dimethyl-formamidinium chloride, instead of cyanoacetic acid ethyl ester, the following esters of cyanoacetic acid: methyl, n-propyl, isopropyl, n-butyl or isobutyl ester; 2'-hydroxy-, 2'-chloro-, 2-bromo-, 2- cyano-, 2'-methoxyor 2'-ethoxy-ethyl ester; 3'-methoxypropyl or 4-methoxy butyl ester; 2-(B-hydroxyor -methoxy-ethylene-oxy)- ethyl esters; 2'-dimethylaminoor 2-diethylamino-ethyl ester; 2-bis-(/3-hydroxyethyl)- 2'-bis-(,B-methoxyethyl)- or 2'-bis-(B-cyanoethyl)-aminoethyl ester; vinyl or allyl ester; benzyl, p-chlorobenzyl 14 or p-methoxybenzyl ester; 'y-phenylpropyl ester; phenyl, p-chlorophenyl, p-tolyl, p-hydroxyethylphenyl or 4-pyridyl ester.

Brominated or chlorinated ,8-(4,8-dihydroxy-5-aminol-anthraquinonylamino)-a-cyanoacrylic acid esters which give reddish blue dyeings are also obtained, when the brominated or chlorinated N-(4,8-dihydroxy-5-amino-1- anthraquinonyl) N dimethyl-formamidinium chlorides which can be obtained from 1,5-diamino-4,8-dihydroxyanthraquinones containing 5 to 25% bromine or chlorine and prepared by bromination or chlorination of 1,5-diamino-4,8-dihydroxy-anthraquinone in solvents such as o-dichlorobenzene or sulphuric acid, are reacted according to Example 18 with the aforesaid cyanoacetic acid esters.

EXAMPLE 19 28.8 parts N-(4,5 dihydroxy-S-amino-l-anthraquinonyl)-N-dimethyl-for1namidinium chloride and 9.65 parts cyanoacetic acid methyl ester in 180 parts nitrobenzene are condensed at 50-60 C. in the presence of 14 parts of anhydrous sodium acetate according to Example 18. There are obtained 27.6 parts or 91.5% of theory of ,B- (4,5-dihydroxy 8 amino-l-anthraquinonylamino)-acyanoacrylic acid methyl ester, crystallised in the form of redish blue small needles.

C H N O (379.3). Calcd. (percent): N, 11.08; 0, 25.34. Found (percent): N, 11.22; 0, 25.14.

When applied to fibres of polyethylene terephthalate, cellulose triacetate or polyamide by dyeing or printing according to Example 1(b) or 1(c), the dyestutf yields strong navy-blue shades of excellent fastness to light, washing, thermofixing and ironing.

Analogous fl-(4,5 dihydroxy-8-amino-l-anthraquinonyl-amino)-a-cyanoacrylic acid esters are obtained by using for the conversion of the N- (4,5-dihydroxy-8-aminol-anthraquinonyl)-N-dimethyl-formamidinium chloride, instead of cyanoacetic acid methyl ester, the following esters of cyanoacetic acid: ethyl, n-propyl, isopropyl, nbutyl, isobutyl or amyl esters; 2'-hydroxy-, 2'-chloro-, 2- bromo-, 2'-cyano-, 2'-methoxyor 2-ethoxy-ethyl ester; 3'-methoxy-propyl or 4-methoxybutyl ester; 2-(;8-hydroxyor -methoxy-ethylene-oxy)-ethyl ester; 2'-dimethylaminoor 2'-bis-(,B-hypdroxyethyl)-amino-ethyl ester; vinyl or allyl ester; benzyl or m-methoxybenzyl ester; 7- phenylpropyl ester; phenyl, m-chlorophenyl, p-t-butylphenyl, p-hydroxy-ethoxyphenyl or 3-pyridyl ester.

Brominated or chlorinated fi-(4,5-dihydroxy-8-aminol-anthraquinonylamino)-u-cyanoacrylic acid esters yielding strong navy-blue dyeings are also obtained, when the brominated or chlorinated N-(4,5-dihydroxy-8-amino-1- anthraquinonyl) N dimethyl-formamidinium chlorides which can be obtained from 4,5-dihydroxy-1,8-diaminoanthraquinones containing 5-25% bromine or chlorine and prepared by bromination or chlorination of 4,5-dihydroxy-1,S-diamino-anthraquinone in solvents such as odichlorobenzene or sulphuric acid, are reacted according to Example 19 with the aforesaid cyanoacetic acid esters.

EXAMPLE 20 19 parts 4-hydroxy-l-amino-anthraquinoneand 6.3 parts dimethyl formamide in parts o-dichlorobenzene are mixed at 5060 C. with 10.5 parts thionyl chloride; when the formation of amidinium chloride in the form of yellow-red prisms is completed, the mixture is stirred in a vacuum for about 1 hour. 14 parts cyanoacetic acid- B-methoxyethyl ester and 20 parts of anhydrous sodium acetate are then added and the mixture is stirred at 50- 70 C. until the dyestulf formation is completed. After cooling, the product which crystallises in the form of red needles is filtered off with suction, washed with methanol and water, and there are obtained 2 8.2 parts B-(4- hydroxy-l-anthraquinonylamino)-a-cyanoacrylic acid-B'- methoxyethyl ester of 90.5% of theory.

C H N O (392.3). Calcd. (percent): N, 7.16; O, 24.47. Found (percent): N, 7.23; O, 24.36.

When applied to fibres of polyethylene terephthalate, cellulose triacetate or polyamide by dyeing or printing according to Example 1(b) or 1(0), the dyestufi gives, with a high yield and very good texture, brilliant red shades which are characterised by excellent fastness to light, washing, thermofixing, rubbing and ironing.

Analogous fi-(4 hydroxy-l-anthraquinonylamino)-otcyanoacrylic acid esters are obtained by using, instead of the cyanoacetic acid-fl-methoxyethyl ester mentioned in the present example, the following esters of cyanoacetic acid: methyl, ethyl, n-propyl, isopropyl, n-butyl, isobutyl or amyl ester; 2-hydroxy-, 2'-chloro-, 2'-bromo-, 2'-cyano-, or 2'-ethoxy-ethyl ester; 3'-methoxypropyl or 4'-methoxybutyl ester; 2- (fi-hydroxyor methoxyethylene-oxy)- ethyl ester; 2'-dimethylaminoor 2-bis- (B-hydroxyethyD- amino-ethyl ester; vinyl or allyl ester; cyclohexyl or 4'- methyl-cyclohexyl ester; benzyl, 4-chlorobenzyl or 3- methoxybenzyl ester; fi-phenylethyl or y-phenylpropyl ester; phenyl, 4-chlorophenyl, 3-bromophenyl, 3-trifiuoromethylphenyl or 4-dimethyl-aminophenyl ester.

EXAMPLE 21 26.2 parts N-(4-hydroxy 1 anthraquinonyl)-N-dimethyl-forrnamidinium chloride in 150 parts nitrobenzene are mixed at 20 C. with 6.6 parts malonic dinitrile and 14 parts of anhydrous sodium acetate, and the mixture is stirred at room temperature for 5 hours. The product which crystallises in the form of red small needles is filtered off with suction, washed with methanol and water, and there are obtained 22.9 parts fi-(4-hydroxyl-1-anthraquinonylamino)-a-cyanoacrylic acid nitrile or 95.3% of theory.

C H N O (315.2). Calcd. (percent): N, 13.32; 0, 15.22. Found (percent): N, 13.35; 0, 15.17.

When applied to fibres of polyethylene terephthalate, cellulose triacetate or polyamide by dyeing or printing according to Example 1(b) or 1(c), the dyestuff yields brilliant red shades of excellent fastness to light, Washing, thermofixing and rubbing.

EXAMPLE 22 37.6 parts N-(4,8 dihydroxy-S-amino-6-phenylthio-lanthraquinonyl) N dimethyl-formamidinium chloride and 11 parts cyanoacetic acid ethyl ester in 240 parts nitrobenzene are mixed at 70-80 C. with 14 parts of anhydrous sodium acetate, and the mixture is stirred until the dyestutf formation is completed. After cooling, the product which crystallises in the form of reddish blue small needles is filtered off with suction, washed with methanol and Water, and there are obtained 389 parts fl-(4,8-dihydroxy 5 amino-6-phenylthio-l-anthraquinonyl)-a-cyanoacrylic acid ethyl ester or 97% of theory.

C N N O S: (501.4). Calcd. (percent): N, 8.39; O, 19.14. Found (percent): N, 8.51; O, 18.98.

When applied to fibres of polyethylene terephthalate cellulose triacetate or polyamide by dyeing or printing according to Example 1(b) or 1(c), the dyestuff yields reddish blue shades of very good fastness to light, washing and thermofixing.

The dyestuifs which are obtained according to Example 22 from appropriately substituted N-(4,8 dihydroxy-5- amino 1 anthraquinonyl)-N'-dimethyl-formamidinium chlorides, and their shades on polyethylene terephthalate fibres are stated in the following table:

nonylamino)wit-cyanoacrylic acid methyl ester.

16 EXAMPLE 28 326 parts N-(4,5 dihydroxy-8-amino-7-methylthio-1- anthraquinonyl)-N'-dimethyl-formamidinium chloride in 180 parts nitrobenzene are condensed according to EX- ample 22 with 17 parts cyanoacetic benzyl ester in the presence of 14 parts of anhydrous sodium acetate. 37.5 parts [i-(4,5 dihydroxy-8-amino-7-methylthio-l-anthraquinonylaminoyet-cyanoacrylic acid benzyl ester or 93.5% of theory are obtained.

C H N O S: (501.4). Calcd. (percent): N, 8.39; O, 19.14. Found (percent): N, 8.48; O, 19.01.

When applied to fibres of polyethylene terephthalate, cellulose triacetate or polyamide by dyeing or printing according to Example 1(b) or 1(c), the dyestufi yields navy-blue shades of very good fastness to light, washing and thermofixing.

The dyestuffs which are obtained according to Example 28 from appropriately substituted N-(4,5-dihydroxy- S-I-anthraquinonyl)-N-dimethyl formamidinium chlorides, and their shades on polyethylene terephthalate fibres are stated in the following table:

nonylamino)-a-cyanoacrylic acid methyl ester.

EXAMPLE 34 21.6 parts 4,5,8-trihydroxy-l-amino-anthraquinone and 6.3 parts dimethyl formamide in parts o-dichlorobenzene are mixed at 50-60 C. with 10.5 parts thionyl chloride; when the formation of amidinium chloride is completed, the mixture is stirred in a vacuum for about 1 hour. 11 parts cyanoacetic acid ethyl ester and 20 parts of anhydrous sodium acetate are then added and the mixture is stirred at 50-60 C. until the dyestuff formation is completed. After cooling, the product Which crystallises in the form of orange-coloured prisms is filtered off with suction, washed with methanol and water, and there are obtained 28 parts 8-(4,5,S-trihydroxy-l-anthraquinonylamino)-ot-cyanoacrylic acid ethyl ester or 89.3% of theory.

C H N O (394.3). Calcd. (percent): N, 7.12; O, 28.4. Found (percent): N, 7.23; O, 28.22.

When applied to fibres of polyethylene terephthalate, cellulose triacetate or polyamide by dyeing or printing according to Example 1(b) or 1 (c), the dyestuff yields red-yellow shades of very good fastness to thermofixing, light and washing.

Analogous B (4,5,8-trihydroxy-l-anthraquinonylamino)-u-cyanoacrylic acid esters are obtained by replacing the cyanoacetic acid ethyl ester mentioned in the present example, with the following esters of cyanoacetic acid: methyl, n-propyl or n-butyl ester; 2-hydroxy-, 2-chloroor 2-methoxy-ethyl ester; benzyl or phenyl ester.

The B (4,5,8 trihydroxy-l-anthraquinonylamino)-otcyanoacrylic acid nitrile which dyes polyethylene terephthalate fibres according to Example 1(b) in orange shades, is obtained by replacing the cyanoacetic acid ethyl ester mentioned above with 6.6 parts malonic dinitrile.

EXAMPLE 35 19 parts 1-amino-5-hydroxy-anthraquinone in 150 parts nitrobenzene are converted into the amidinium chloride according to Example 34 by means of 6.3 parts dimethyl formamide and 10.5 parts thionyl chloride. The melt is mixed with 17 parts cyanoacetic acid benzyl ester and 17 parts of anhydrous sodium acetate, the mixture is 17 stirred at 50-70 C. until the dyestufi formation is completed, the product which crystalli'ses in the form of yellow small needles is filtered off with suction, washed with methanol and water, and there are obtained 32 parts (5 hydroxy-l-anthraquinonylaminoyet-cyanoacrylic acid benzyl ester or 95% of theory.

C H N O (424.3). Calcd. (percent): N, 6.61; O, 18.82. 'Found (percent): N, 6.72; O, 18.69.

When applied to fibres of polyethylene terephthalate, cellulose triacetate or polyamide by dyeing or printing according to Example 1(b) or 1(c), the dyestuff yields golden yellow shades of very good fastness to light, thermofixing and washing.

Analogous p (5 hydroxy-l-anthraquinonylamino)-acyanoacrylic acid esters are obtained by replacing the cyanoacetic acid benzyl ester mentioned in the present example with the following esters of cyanoacetic acid: methyl, ethyl, n-propyl or cyclohexyl ester; 2-hydroxy-, 2-chloro-, 2-cyanoor Z-methoxy-ethyl ester; phenyl or p-methoxyphenyl ester.

The B (5 hydroxy-l-anthraquinonylamino)war-cyanoacrylic acid nitrile which dyes polyethylene terephthalate fibres according to Example 1(b) in golden yellow shades is obtained according to Example 35 by replacing the cyanoacetic acid benzyl ester mentioned above with 6.6 parts malonic dinitrile.

EXAMPLE 36 melt is mixed with 22 parts cyanoacetic acid ethyl ester and 40 parts of anhydrous sodium acetate, and the mixture is stirred at 50-70 C. until the dyestuft' formation is completed; after cooling, the product which crystallises in the form of coarse brown-orange prisms is filtered 01f with suction, washed with methanol and water, and there are obtained 53 parts fi-(4-methoxy-1-anthraquinonylamino)wit-cyanoacrylic acid ethyl ester or 92% of theory.

C H N O (376.3). Calcd. (percent): N, 7.45; O, 21.24. Found (percent): N, 7.57; O, 21.13.

When applied to fibres of polyethylene terephthalate, cellulose triacetate or polyamide by dyeing or printing according to Example 1(b) or 1(c), the dyestuff yields orange shades of excellent fastness to light, wasln'ng, thermofixing, rubbing and ironing.

Analogous fl-(4-methoxy-1 anthraquinonylamino)-acyanoacrylic acid esters are obtained by replacing the cyanoacetic acid ethyl ester mentioned in the present Example with the following esters of cyanoacetic acid: methyl, n-propyl, isopropyl, n-butyl, isobutyl or amyl ester; 2-hydroxy-, 2'-chloro-, 2'-bromo-, 2'-cyano-, 2'- methoxyor 2'-ethoxy-ethyl ester; 3'-methoxypropyl or 4'- methoxybutyl ester; 2'- (fi-hydroxyor methoxy-ethyleneoxy)-ethyl ester; 2' dimethylaminoor 2'-diethylaminoethyl ester; 2' bis-(fi-hydroxyethyl)-, 2-bis-(fi-methoxyethyl) or 2-bis-(B-cyanoethyl)-aminoethyl ester; vinyl or allyl ester; cyclohexyl or 4 4 methyl-cyclohexyl ester; benzyl, 4-chlorobenzyl or 3-methoxybenzyl ester; B-phenylethyl, or 'y-phenylpropyl ester; phenyl, 4-chlorophenyl, 3-bromophenyl, 3 trifluoromethylphenylor 4-dimethylamino-phenyl ester.

Analogous 3 (.5 alkoxy-l-anthraquinonylamino)-ucyanoacrylic acid esters are also obtained by using for the condensation with cyanoacetic acid esters, instead of the 4-methoxy-l-amino-anthraquinone mentioned in the present example, the 4-ethoxy-, 4-propoxyor 4-benzyloxy-1- amino-anthraquinone.

EXAMPLE 37 20.2 parts 1-amino-4-methoxy-anthraquinone in 120 parts nitrobenzene are converted into the amidinium chloride according to Example 34 by means of 6.3 parts dimethyl formamide and 10.5 parts thionyl chloride. 6.6

parts malonic dinitrile and 14 parts of anhydrous sodium acetate are added at 20 C. and the mixture is stirred at room temperature until the formation of the dyestuif in the shape of orange prisms is completed. After filtering off with suction and Washing with methanol and water, there are obtained 25 parts fl-(4 4 methoxy-l-anthraquinonylamino)-u-cyanoacrylic acid nitrile or of theory.

C H N O (329.3). Calcd. (percent): N, 12.76; 0, 14.58. Found (percent): N, 12.63; 0, 14.64.

When applied to fibres of polyethylene terephthalate, cellulose triacetate or polyamide by dyeing or printing according to Example 1(b) or 1(c), the dyestuif yields orange shades of excellent fastness to light, washing, thermofixing, rubbing and ironing.

If the 4-methoxy-l-amino-anthraquinone mentioned in the present example is replaced with 4-ethoxy-, 4-propoxyor 4-benzy1oxy-1 amino-anthraquinone, than analogous dyestufis are obtained, which also dye polyester or polyamide fibres in orange shades.

EXAMPLE 3 8 23.9 parts 5-nitro-4,8-dihydroxy-l-amino-anthraquinone in 175 parts o-dichlorobenzene are converted into the amidinium chloride according to Example 34 by means of 6.3 parts dimethyl formamide and 10.5 parts thionyl chloride. 17 parts cyanoacetic acid benzyl ester and 12 parts of anhydrous sodium acetate are added and the mixture is stirred at 50-70 C. until the formation of the dyestuff in the shape of red prisms is completed. After cooling, the product is filtered off with suction, washed with methanol and water, and there are obtained 375 parts B-(S-nitro- 4,8-dihydroxy 1 anthraquinonylamino)-a-cyanoacrylic acid benzyl ester or 97% of theory.

C H N O (485.4). Calcd. (percent): N, 8.66; O, 26.39. Found (percent): N, 8.73; O, 26.12.

When applied to fibres of polyethylene terephthalate, cellulose triacetate or polyamide by dyeing or printing according to Example 1(b) or 1(c), the dyestuif yields bluish red shades of excellent fastness to light, washing, and thermofixing.

Analogous 3-(5-nitro-4,8-dihydroxy-l-anthraquinonylamino)-a-cyanoacrylic acid esters are obtained by replacing the cyanoacetic benzyl ester mentioned in the present example with the following esters of cyanoacetic acid; methyl, ethyl, n-propyl, isopropyl or butyl ester; 2'-hydroxy-, 2' chloro-, 2'-cyano-, 2'-methoxyor 2'-ethoxyethyl ester; 3'-methoxypropyl or 4'-methoxybutyl ester; 2'- dimethylamino-ethyl ester; allyl, benzyl, p-chlorobenzyl, phenyl or p-methoxyphenyl ester.

Analogously, {3-(8-nitro-4,5-dihydroxy-l-anthraquinonylarnino)-a-cyanoacrylic acid esters which dye polyester and polyamide fibres in red shades are obtained by replacing the 5-nitro-4,8-dihydroxy-l-amino-anthraquinone mentioned in the present example with the isomeric 8-nitro- 4,5-dihydroxy-l-amino-anthraquinone.

EXAMPLE 39 23.9 parts 5-nitro-4,8-dihydroxy-l-amino-anthraquinone in parts nitrobenzene are converted into the amidinium chloride according to Example 34 "by means of 6.3 parts dimethyl formamide and 10.5 parts thionyl chloride. 6.6 parts malonic dinitrile and 14 parts of anhydrous sodium acetate are added at 4050 C. and the mixture is stirred until the formation of the dyestuff in the shape of red prisms is completed. After filtering off with suction and washing with methanol and water, there are obtained 28.2 parts 3-(5 nitro 4,8 dihydroxy-l-anthraquinonylamino)-a-cyanoacrylic acid nitrile or 94% of theory.

C H N O (376.2). Calcd. (percent): N, 14.88; 0, 25.2. Found (percent): N, 14.72; 0, 25.62.

When applied to fibres of polyethylene terephthalate, cellulose triacetate or polyamide by dyeing or printing according to Examples 1(b) or 1(c), the dyestutf yields red shades of excellent fastness to light, washing and thermofixing.

1 9 (EXAMPLE 40 Working analogously as described in Example 39 there is obtainable ,8 (8 nitro-4,5-dihydroxy-anthraquinonylamino)-a-cyanoacrylic acid nitrile which dyes polyester and polyamide fibres in red shades is obtained by replacing the nitro 4,8-di'hydroxy-1-amino-anthraquinone mentioned in the present example with the isomeric 8- nitro-4,S-dihydroxy-l-amino-anthraquinone.

EXAMPLE 41 (a) 25 parts N-(l-anthraquinonyl)-N'-dimethyl-formamidinium chloride in 300 parts ethanol are mixed at 20- 25 C. with 8.7 parts triethylamine and then with 16 parts cyanoacetic acid benzyl ester. The mixture is slowly heated to boiling temperature and boiled for about 4 hours; after cooling the product which crystallises in the form of yellow small needles is filtered off with suction, and there are obtained 31.3 parts ,B-(l-anthraquinonylamino)-w cyanoacrylic acid benzyl ester or 96.5% of theory.

C H N O (408.4). Calcd. (percent): N, 6.86; O, 15.67. Found (percent): N, 6.81; O, 15.72.

When applied to fibres or polyethylene terephthalate, cellulose triacetate or polyamide by dyeing or printing according to Example 1(b) or 1(c), the dyestutf yields clear yellow shades which are characterised by excellent fastness to light, Washing, thermofixing, rubbing and ironing.

Analogous ,B (l-anthraquinonylamino)-a-cyanoacrylic acid esters are obtained by replacing the cyanoacetic acid benzyl ester mentioned in the present example with the following esters of cyanoacetic acid: methyl, ethyl, npropyl, isopropyl, n-butyl, isobutyl or amyl ester; 2'- hydroxy-, 2'-chloro-, 2-bromo-, 2'-cyano-, 2'-methoxyor 2-ethoxy-ethy1 ester; 3-methoxypropyl or 4'-methoxybutyl ester; 2'-(fi-hydr0xyor methoxy-ethylene-oxy)- ethyl ester; 2-dimethylaminoor Z'-diethylamino-ethyl ester; 2-bis-(fi-hydroxyethyl)-, 2'-bis-(B-methoxyethyl)- or 2'-bis-(B-cyanoethyl)-arninoethyl ester; vinyl, allyl or methallyl ester; cyclohexyl or 4-methyl-cyclohexyl ester; p-chlorobenzyl or p-methoxybenzyl ester; ,B-phenylethyl or 'y-phenyl-propyl ester; phenyl, p-chlorophenyl, m-fluorophenyl, m-methylphenyl, p-methoxyphenyl or p-dimethylamino-phenyl ester.

In an analogous manner, ,3-(1-anthraquinonylamin0)- ,B-methyl-a-cyanoacrylic acid benzyl ester or }8( l-anthraquinonylamino)-/3-phenyl-u-cyanoacrylic acid benzyl ester is obtained by replacing the N-(1-anthraquinonyl)-N-dimethyl-formamidinium chloride mentioned in the present example with N (l anthraquinonyl) N' dimethylacetamidinium chloride or N-(1-anthraquinonyl)-N'-dimethyl-benzamidinium chloride.

(b) 10 parts of polyethylene terephthalate fibres are dyed at 125-130 C. for 2 hours in a bath adjusted to pH 4.5 and consisting of 400 parts of water and 0.1 part of finely dispersed B (1 anthraquinonylamino) u-cyanoacrylic acid benzyl ester, and the fibres are subsequently rinsed and dried. A yellow dyeing is obtained, which is characterised by very good fastness properties.

(0) 10 parts of polyethylene terephthalate fibres are dyed at 100 C. for 1 /2 hours in a bath adjusted to pH 4.5 and consisting of 400 parts of water, 0.1 part of finely dispersed B (1 anthraquinonylamino)-a-cyanoacrylic acid benzyl ester and 1.5 parts o-cresotic acid methyl ester. A yellow dyeing is obtained, which is characterised by very good fastness properties.

(d) 10 parts of polyamide fibres are dyes at the boil for 1 hour in a bath consisting of 400 parts of water, 0.2 parts of a conventional dispersing agent and 0.2 part of finely dispersed 8 (1 anthraquinonylamino)ant-cyanoacrylic acid benzyl ester. A clear yellow dyeing of very good fastness properties is obtained. Equally good results are achieved when the polyamide fibres are replaced with polyurethane fibres.

(e) 20 parts of cellulose-2V2 acetate fibres are dyes at 75 C. for one hour in a bath consisting of 600 parts of water, 1 part of Marseilles soap and 0.2 part fl-(l-anthraquinonylamino)-u-cyanoacrylic acid benzyl ester. A yellow dyeing of good fastness to light and washing is obtained.

The dyestuifs which are obtained according to Example 41 from appropriately substituted N-(l-anthraquinonyl)- N'-dimethyl-formamidinium chlorides, and their shades on polyester fibres are stated in the following table.

Example Dyestufi Orange.

EXAMPLE 52 25 parts N (1 anthraquinonyl-(N'-dimethyl-formamidinium chloride in 300 parts ethanol are mixed at 20-25 C. with 8.7 parts triethylamine and then with 5.6 parts malonic dinitrile. The mixture is stirred at room temperature until the dyestuif formation is completed, the product which crystallises in the form of yellow small needles is filtered off with suction, and there are obtained 23 parts B-(l-anthraquinonylamino) a cyanoacrylic acid nitrile or 96.7% of theory.

C H N O (299.2). Calcd. (percent): N, 14.03; 0, 10.68. Found (percent): N, 13.92; 0, 10.76.

When applied to fibres of polyethylene terephthalate, cellulose triacetate or polyamide by dyeing or printing according to Example 1(b) or 1(e), the dyestuif yields clear yellow shades of excellent fastness to light, washing, thermofixing and ironing.

The same dyestufi is obtained according to Example 52, when the ethanol is replaced with solvents such as methanol, propanol, ethylene glycol, glycol monomethyl ether, diethylene glycol monomethyl ether, dibutyl ether, glycol monomethyl ether acetate, dimethyl formamide, dimethyl sulphoxide, tetramethylenesulphone, butanone- (2), benzene, toluene, chlorobenzene, o-dichlorobenzene or nitrobenzene, or when the triethylamine is replaced with acid-binding agents such as calcium oxide, sodium or potassium hydroxide, sodium, potassium or ammonium carbonate or bicarbonate, sodium or potassium acetate, N,N-dimethylaniline, pyridine, picoline or quinoline, sodium methylate or sodium ethylate.

In an analogous manner, B-(1-anthraquinonylamino)- fi-methyl-a-cyanoacrylic acid nitrile or p-(l-anthraquinonylamino) ,8 -phenyl oz cyanoacrylic acid nitrile is obtained by replacing the N (l -anthraquinonyl) N dimethyl formamidinium chloride mentioned in the present example with N-( l-anthraquinonyl)- N dimethyl-acetamidinium chloride or N-(l-anthraquinonyl)-N'-dimethyl-benzamidinium chloride.

The dyestuffs which can be obtained according to Example 52 from appropriately substituted N-(l-anthraquinonyl)-N-dimethyl-fonnamidinium chlorides, and their 21 shades on polyester fibres are stated in the following table:

Example Dyestufi Shade 3 fl-(fi-chloro-l-anthraquinonylamino)-a-cyanoacryl- Yellow.

ic acid nitrila.

54 fl-(fi, 7-dich1oro-l-anthraquinonylamino)-a-cyano- D0.

acrylic acid nitrile.

55 B-(fi-fluoro-1-anthraquinony1amino)-a-cyanoacryl- Do.

ic acid nitrile.

56 fl-(6,7-difluoro-l-anthraquinonylamino)-a-cyan- D0.

acrylic acid nitrile.

57 B-(6-methylthio-l-anthraquinonylamino) a-cyano- Do.

acrylic acid nitn'le.

58 B-(6-phenylthio-l-anthraquinonylamino)-a-cyano- Do.

acrylic acid nitn'le.

59 fl-(6-methylsulphonyl-l-anthraquinonylamino)- D0.

a-cyanoacrylic acid nitrile.

60 B-(6-phenylsulphonyl-l-anthraquinonylamino)- Do.

a-oyanoecrylio acid nitrile.

61 B-(4-cthylthio-l-anthraquinonylamino)-a-cyano- Orange.

acrylic acid nitn'le.

62 B-(4-phenylthio-l-anthraquinonylamino)-a-cyano- Do.

acrylic acid nitrile.

EXAMPLE 63 22.2 parts l-amino-S-acetylamino-anthraquinone are converted into the amidinium chloride by means of 6.3 parts dimethyl formamide and 10.5 parts thionyl chloride at 5060 C., and 11 parts cyanoacetic acid ethyl ester and 20 parts of anhydrous sodium acetate are added. The mixture is stirred at 50-60 C. until the dyestufi formation is completed, the product which crystallised in the form of yellow small needles is filtered ofi with suction after cooling, washed with methanol and water, and there are obtained 30.2 parts p-(-acetylamino-1-anthra quinonylamino)-a-cyanoacrylic acid ethyl ester of 94.5% of theory.

C H N O (403.3). Calcd. (percent): N, 10.41; 0, 19.83. Found (percent): N, 10.47; 0, 19.78.

When applied to fibres of polyethylene terephthalate, cellulose triacetate or polyamide by dyeing or printing according to Example 1(b) or 1(c), the dyestufi' yields clear yellow shades of excellent fastness to light, washing, thermofixing and rubbing.

Analogous B-(S-acetylamino-1-anthraquinonylamino) a-cyanoacrylic acid esters are obtained by replacing the cyanoacetic acid ethyl ester mentioned in the present ex ample with the following esters of cyanoacetic acid: methyl, n-propyl, isopropyl, n-butyl or isobutyl ester; 2'- hydroxy-, 2-chloro-, 2'-cyano-, 2'-methoxyor 2-ethoxyethyl ester; 3'-methoxypropyl or 4-methoxybutyl ester; 2'-(B-hydroxyor -methoxyethylene-oxy)-ethyl ester or 2'-dimethylaminoethyl ester; vinyl or allyl ester; cyclohexyl or 4methyl-cyclohexyl ester; benzyl, 2-phenylethylor 3-phenylpropyl ester; phenyl, 4-methoxyethyl or 3- ethoxycarbonyl phenyl ester.

Analogously, B (5 acetylamino-l-anthraquinonylamino)-u-cyanoacrylic acid nitrile is obtained by replacing the cyanoacetic acid ethyl ester mentioned in the present example with 6.6 parts malonic dinitrile.

EXAMPLE 64 parts 1,S-diamino-anthraquinone are converted into the bis-amidinium chloride by means of 10.5 parts dimethyl formamide and 16.8 parts thionyl chloride in 150 parts nitrobenzene at 50-60 C., 15 parts cyanoacetic acid methyl ester and 30 parts of anhydrous sodium acetate are added, and the mixture is stirred at 50-60 C. until the dyestuif formation is completed. After cooling, the product which crystallises in the form of yelloworange small needles is filtered off with suction, washed with methanol and water, and there are obtained 28.5 parts 1,5 bis (2'-methoxycarbonyl-2-cyanoethyleneamino)-anthraquinone or 99% or theory.

C H N O (456.4). Calcd. (percent): N, 12.27; 0, 21.0. Found (percent): N, 12.33; 0, 20.88.

When applied to fibres of polyethylene terephthalate or cellulose triacetate by dyeing or printing according to 22v Example 1(b) or 1(c), the dyestulf yields clear yellow shades of excellent fastness to light, washing and thermofixing. When incorporated in lacquers and varnishes, the dyestuli is a suitable yellow pigment which is fast to light and solvents. When the cyanoacetic acid methyl ester mentioned in the present example is replaced with 10 parts malonic dinitrile, then there is obtained the 1,5-bis- (2,2'-dicyanoethylene-amino)-anthraquinone which dyes polyethylene terephthalate fibres in yellow shades and can also be used for synthetic resin lacquers as a yellow pigment fast to light and solvents.

EXAMPLE 65 20 parts 1,4 diamino anthraquinone are converted into the bis-amidinium chloride by means of 14 parts dimethyl formamide and 23.6 parts thionyl chloride in 210 parts nitrobenzene at 50-60 C., 30 parts cyanoacetic acid-fi-methoxyethyl ester and 40 parts of anhydrous sodium acetate are added, and the mixture is stirred at 50-60 C. until the dyestutf formation is completed. After cooling the product which crystallises in theform of brown-red needles is filtered off with suction, washed with methanol and water, and there are obtained 42.1 parts 1,4 bis (2' 8 methoxyethylcarbonyl 2' cyanoethyleneamino)-anthraquinone or 92% of theory.

C H N O (544.4). Calcd. (percent): N, 10.29; 0, 23.52. Found (percent): N, 10.37; 0, 23.41.

When applied to fibres of polyethylene terephthalate or cellulose triacetate by dyeing or printing according to Example 1(b) or 1(c), the dyestulf yields brownish red shades of very good fastness to light, washing and thermofixing. When the dyestuif is incorporated as pigment in synthetic resin lacquers, a brownish red colouration is obtained, which is fast to light and solvents. When the cyanoacetic acid-B-methoxyethyl ester mentioned in the present example is replaced with 13.8 parts malonic dinitrile, there is obtained 1,5 bis (2,2' dicyanoethyleneamino)-anthraquinone which dyes fibres of polyethylene terephthalate and cellulose triacetate in brownish red shades and can also be used for synthetic resin lacquers as a brownish red pigment fast to light and solvent.

EXAMPLE 66 22.7 parts 4,8 diamino 1,5 dihydroxy anthraquinone are converted in 210 parts nitrobenzene at 50- 60 C. by means of 14 parts dimethyl formamide and 23.6 parts thionyl chloride into the bis-amidinium chloride which crystallises in the form of pale violet prisms, 35 parts cyanoacetic acid benzyl ester and 40 parts sodium acetate are added, and the mixture is stirred at -110 C. until the formation of the dyestuif in the shape of blue-violet small needles is completed. After cooling, the product is filtered off with suction, washed with methanol and water, and there are obtained 52 parts 4,8 bis (2 benzylcarbonyl 2' cyanoethyleneamino) 1,5 dihydroxy anthraquinone or 96.5% of theory.

C H N 0 (640.5). Calcd. (percent): N, 8.76; O, 19.95. Found (percent): N, 8.63; O, 19.84.

When applied to fibres of polyethylene terephthalate or cellulose triacetate by dyeing or printing according to Example 1(b) or 1(c), the dyestufi? yields red-blue shades of excellent fastness to light, washing and sublimation.

23 EXAMPLE 67 22.6 parts 1,4,5,8 tetra amino anthraquinone are converted into the tetrakis-amidinium chloride by means of 27 parts dimethyl formamide and'44 parts thionyl chloride in 320 parts nitrobenzene at 70-80 C., 39 parts cyanoacetic acid methyl ester and 75 parts of anhydrous sodium acetate are added, and the mixture is stirred at 110-120 C. until the dyestuff formation is completed. After cooling, the product is filtered off with suction, washed with methanol and water, and there are obtained 57.4 parts 1,4,5,8 tetrakis (2' methoxycarbonyl-2'- cyanoethylene-amino)-anthraquinone or 96.5% of theory.

C H N O (704.5). Calcd. (percent): N, 15.89; 0, 22.71. Found (percent): N, 15.71; 0-, 22.52.

The dyestuff can be used for colouring synthetic resins as a red-blue pigment which is fast to light and solvents. When the cyanoacetic acid methyl ester is replaced with 26 parts malonic dinitrile, there is obtained, 1,4,5,8 tetrakis (2',2 dicyanoethylene amino)- anthraquinone.

EXAMPLE 68 19 parts (N (1 anthraquinonyl) N dimethylacetamidinium chloride in 100 parts nitrobenzene are mixed at 20 C. with 4.5 parts malonic dinitrile and 9 parts of anhydrous sodium acetate, and the mixture is stirred until the dyestuff formation is completed. The product which crystallises in the form of yellow small needles is filtered off with suction, washed with methanol and water, and there are obtained 16.5 parts B-(l-anthraquinonyl amino) at cyano crotonic acid nitrile or 91% of theory.

C H N O (313.3). Calcd. (percent): N, 13.4; 0', 10.22. Found (percent): N, 13.28; 0', 10.29.

When applied to fibres of polyethylene terephthalate, cellulose triacetate or polyamide by dyeing or printing according to Example 1(b) or 1(c), the dyestutf yields clear yellow shades of excellent fastness to light, washing, thermofixing, rubbing and ironing.

The dyestuffs which are obtained according to Example 68 from the corresponding N (1 anthraquinony1)- N dimethylamidinium chlorides and malonic dinitrile, and their shades on polyester fibres are stated in the following table:

cyanoacrylic acid nitrile.

EXAMPLE 80 parts N-(Z-anthraquinonyl)-N-dimethylformamidinium chloride and 17 parts cyanoacetic acid benzyl ester are stirred with 20 parts of anhydrous sodium acetate in 150 parts nitrobenzene at 50-60" C. until the formation of the dyestulf in the shape of greenish yellow small needles is completed. After cooling, the product is filtered off with suction, washed with methanol and water, and there are obtained 31 parts B-(Z-anthraquinonyl-amino)-u-cyanoacrylic acid benzyl ester or 95% of theory.

C H N 'O (408.3). Calcd. (percent): N, 6.87; O, 15.68. Found (percent): N, 6.83; O, 15.72.

The same dyestulfis obtained in an analogous manner by replacing the N-(Z-anthraquinonyl)-N'-dimethylformamidinium chloride with N (2 anthraquinonyl)-N'- methyl-, -N-phenyl-, -N'-phenyl-N'-methyl-, N'-diethyl-, -N'-tetramethyleneor -N'-pentamethylene-formamidinium chloride, -bromide, -nitrate or -toluene-sulphonate.

When applied to fibres of polyethylene terphthalate, cellulose triacetate or polyamide by dyeing or printing according to Example 1(b) or 1(c), the dyestuif yields greenish yellow shades of very good fasteness properties.

The dyestufi's which are obtained according to Example from appropriately substituted N-(anthraquinonyl)-N'-dimethylamidinium chlorides and cyanoacetic esters, and their shades on polyethylene terephthalate fibres are stated in the following table:

Example Dyestufi Shade 81 6-(4-hydroxy-2-bromo-1-anthraquinonyl- Yellowish amino)-a-cyanoacry1ic acid methyl ester. red.

82 fl-(4-hydroxy-3-bromo-l-anthraquinonyl- Red.

amino)-a-cyanocrotonic acid methyl ester.

83 B-(4-methoxy-2-bromo-l-anthraqulnonyl- Orange. amino)-a-cyanoacrylic acid methyl ester.

84 B-(5-nitro-4-amino-l-anthraquinonylamino) N avy-blue.

a-cyanoacrylic acid benzyl ester.

85 fl-(3-methoxy-4-amino-l-anthraquinonyl- Bluearnino)-a-cyanoacrylic acid methyl ester. voilet.

86 B-(3-phenoxy-4-amino-1-anthraquinonyl- Do. amino) -a-cyauoacrylic acid methyl ester.

87 fl-(3-bromo-4-arnino-1-anthraquinonylarmno)- Do.

a-cyanoacrylic acid-2-methoxyethyl ester.

88 B-(3-cyano-4-am.ino-1-anthraquinonylamino)- Do.

a-cyanoacrylic acid phenyl ester. I

89 B-(3 acetyl-4-amino-1-anthraquinonylammo)- Do.

a-cyanoacrylic acid-4'-pyridyl ester.

90 B-(3ethoxycarbony1-4-amino-l-anthraquiuo- Do.

nylarnino)-a-cyanoacrylic acid ethyl ester.

91 S-(3-(2'-hydroxyethylthio)4-amino-1-anthra- Reddish quinonylamino)-a-cyanoacry1ic acid methyl blue. ester.

92 fl-(3-methylsulphonyl4amino)1-anthraquino Bluish-red.

nylamino)-a-cyanoacrylic acid ethyl ester.

93 fl-(-3phenylsulphonyli-amino-l-anthrequino- Do.

nylamino)-a-cyanoacrylic acid ethyl ester.

94 5 (4-propionylamino-1-anthraquinonylamino)- Red.

a-cyanoacrylic acid propyl ester.

95 B-(2-bromo4-p-toluene-sulphonylamino-1- Yellowrsh anthraquinonylamiuo)-a-cyanoacrylic acid red. ethyl ester.

96 B-(5,8-dichloro--amino-l-anthraquinonyl- Blue-violet.

amino)-a-cyanoacrylic acid benzyl ester.

97 1,4-bis-(2-ethoxycarbonyl-2-cyanoethylene- Bluish red.

amino)-5,8-dihydroxy-anthraquinone.

98 5-(2-methoxycarbonyl-2-cyanoethyleue- Yellow.

amino)-1,Q-thiazole-anthrone.

99 5-(2'-ethoxycarbonyl-2-cyanoethylene-amino)- Do.

1,9-pyrazole-anthrone.

100 5-(2-ethoxycarbonyl-2-cyano-1-Inethyl- Do.

ethylene'amino)-1, 9-anthrapyrimidine.

101 4-(2-benzyloxycarbonyl-2'-cyanoethylene Yellow-red amino)-1-methyl-1, Q-anthrapyridone.

EXAMPLE 102 25 parts N-(Z-anthraquinonyl)-N-dimethyl-formamidinium chloride and 6.6 parts malonic dinitrile in parts nitrobenzene are stirred with 20 parts of anhydrous sodium acetate at 20-30 C. until the formation of the dyestuff in the shape of yellow small needles is completed. After filtering off with suction and washing with methanol and water, there are obtained 22.6 parts B-(Z-anthraquinonylamino)-a-cyanoacrylic acid nitrile or 95.1% of theory.

C H N O (299.2). Calcd. (percent): N, 14.07; 0, 10.69. Found (percent): N, 14.01; 0, 10.79.

When applied to fibres of polyethylene terephthalate, cellulose triacetate or polyamide by dyeing or printing according to Example 1(b) or 1(c), the dyestuff yields greenish yellow shades of very good fastness properties.

The dyestuffs which are obtained according to Example 102 from appropriately substituted N-(anthraquinonyl)-N'-dimethylamidinium chlorides and malonic dinitrile, and their shades on polyethylene terephthalate fibres are stated in the following table:

Example Dyestufl Shade 103 5-(4-hydroxy-Z-bromo-l-anthraquinonyl- Yellowish amiuo)-a-cyanoacrylic acid nitrile. red.

104 13-(4-hydroxy'3bromo-1-anthraquinonyl- Red.

amino)-a-cyanocrotonlc acid nitn'le.

105 B-(4-methoxy-2-bromo l-authraquinonyl- Orange.

amino)-a-cyanoacrylic acid nitrile.

106 B-(fi-nitroi-amino-l-anthraquinonylaminoy Navy-blue.

a-cyanoacrylic acid nitrile.

107 5-(3 methoxy-4-amino-1-anthraquinonyl- Blue-violet.

amino)-a-cyanoacrylic acid nitrile.

6-(3-phenoxyA-arnino-l-anthraquinouyl- Do.

amino)-J-cyanoacrylic acid nitrile. B-(bromO-i-fimino-l-anthraquinonylamlno)- Do weyanoacrlic acid nitrile.

110 B-(3-eyano-4-amino-1-anthraquinonyl- Do.

amino)-acyanoacrylic acid nitrile.

111 5-(3-acctyl-4-amino-l-anthraquinonyl- Do.

amino) a-cyanoacry1ic acid nitrile.

112 B-(3-ethoxycarbonyl-4-amino-1-anthra- Do.

quinonyD-amino)-a-cyanoacrylic acid mtrile.

113 5-(3-(2-hydroxyethylthio)-4-amino-1-anthra- Reddish quinonylamino)-acyanoacrylic acid nitrile. blue.

114 fl-(3-methylsulphonyl-4-amino)-1-anthraquin- Bluish onylamino)-a-cyanoacry1ic acid nitrile. red.-

115 p-(3-pheuylsulphonyl-4-amino-1-anthraquin- Do.

onylamino)-a-cyanoacrylic acid nitrile.

116 fl-(4-propionylamino-l-anthraquinonyl- Red.

amino)-a-cyanoacrylic acid nitrile.

117 fl-(2-bromo-4p-toluene-Sulphonylamino-1- Yellowlsh angzhlraquinonylamino-a-cyanoacrylic acid red. in n e. v

118 5-(5, 8-dichloro-4-amino-l-anthraquinonyl- Blue-- amino)-a-cyanoacrylic acid nitn'le. violet.

119 1, 4-bis-(2, 2-dicyano-ethylene-amino)- Bluish red.

5, S-dihvdroxy-anthraquinone.

120 5-(2, 2-dicyauo-ethylene-amino)-1, 9 Yellow.

thiazole-anthrone.

121 5-(2, 2-dicyano-ethyleue-amino)-1, 9- Do.

pyrazole-anthrone.

122 5-(2, 2-dicyauo-1-methyl-ethy1ene-amino)- Do.

1, Q-anthrapyzimidine.

123 4-(2, 2-dicyano-ethylene-amino)-1-methyl- Yellow-red.

1, Q-anthrapyridone.

What is claimed is: 1. A compound of the formula wherein R is hydrogen; unsubstituted lower alkyl; substituted lower alkyl containing 1 to 3 substituents selected from the group consisting of CN and lower alkoxy; unsubstituted phenyl; substituted phenyl wherein the substituents are selected from the group consisting of Cl, lower alkoxy, di(lower)alkylamino and lower alkoxy carbonyl; cyclohexyl; benzyl; or pyridyl; R is COOR R is phenyl, bromophenyl, chlorophenyl, phenyl lower alkyl; pyridyl; lower alkoxy lower alkyl; cyclohexyl; 4- methylcyclohexyl; hydroxyethyl; chloroethyl; bromoethyl or cyanoethyl; X is H;

R ON --NH--(J=(ERz --NH OH; N benzylamino; lower alkylamino; cyclohexylamino; lower alkoxy; lower alkyl mercapto phenylmercapto lower alkyl carbonylamino; tosylamino; or

MIG

wherein R is H, Cl, CN, lower alkyl or lower alkoxy; Y is H;

R; CN -NH-( J=( J-R2 NH OH or N0 Z is Cl; Br; F; lower alkoxy; lower alkyl mercapto; phenyl mercapto; lower alkylsulfonyl; or phenyl sulfonyl.

2. An anthraquinone dyestuflz of claim 1 having the formula 6. Dyestutf of claim 1 having the formula:

CN I NH-CH=-C O O-GHTCOH5 II I 1 Q 7. Dyestuff of claim 1 having the formula:

l I o n Goon;

8. Dyestuif of claim 1 having the formula:

cu 0 Taca=c-coo-ca -c a 5 9. Dyestuif of claim 1 having the formula:

10. Dyestutf of claim 1 having the formula:

h 27 11. Dyestuff of claim 1 having the formula:

12. Dyestuff of claim 1 having the formula:

28 References Cited UNITED STATES PATENTS 3,411,861 11/1968 Guenthard et a1. 260-376 OTHER REFERENCES Sivasankaran et a1., Chem Ab. v. 57, 3591 (1957). Bredereck et al., Ber. 97 (12) 3397-3403 (1964).

US. Cl. X.R.

mime sm'ms PATENT @FFHIE @ERHWQATEE E @GREQTWN Patent No, 3 v 654 v 319 w Dated April 4 1972 RUTGER NEEFF InventorLs) It is certified that error appears in the above-idi-zntifiedpatent and that said Letters Patent are hereby corrected as shown below:

Coluzgn Line I w 2 1 "R should read --R 2 39 "thiether' should read -thioether=-u 3 Zl "alkoxy merca pto" should read -alkoxy lower alkoxy, mercaptoa 3 Formula l (VH C H should read =(CH 12 26 dryeing should read --dyeing-m l6 5 "cyanoacetic benzyl" should read-cyanoacetic acid benzylo 18 17 "than" should read ---then-.

Zl Table "3" should read --53--.,

5 24 Table "methyl" should read ethyl=-@ 25 Table J should read d 1521x0108, 25 Table B-(bromo-" should read --B-(3bromo H9109, d v 25 63 after "mezoepto" there should be (a. semicolon) o 25 64 after 'phenylmercapto" there should be (a semicolon) v w Signed and sealed this 22nd day of January 1971+,

(SEAL) Attest:

EDWARD M.FLETCHER, JR, RENE ZDa TEGTMEYER v Attesting Officer Acting Commissioner of Patents 

